/*
 * Copyright (c) 2009, 2011, okazoh_tk. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *  - Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 *  - Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 *  - Neither the name of the copyright holder nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include "alkes/core/Debug.h"
#include <stdio.h>

#if defined(ALKES_DEBUG)
#define AL_ERRLV_DEFAULT    AL_ERRLV_ALL
#else
#define AL_ERRLV_DEFAULT    (AL_ERRLV_EMERGENT|AL_ERRLV_ALERT|AL_ERRLV_CRITICAL|AL_ERRLV_ERROR)
#endif


static int default_callback(const char* fmt, va_list arg);

static uint32_t s_error_level = AL_ERRLV_DEFAULT;
static alkes_error_callback s_error_callback = default_callback;

AL_EXPORT_API void alkes_dprintf(uint32_t level, const char* fmt, ...)
{
    if (!s_error_callback || 0 == (s_error_level & level))
    {
        // do nothing.
        return ;
    }

    va_list ap;
    va_start(ap, fmt);

    s_error_callback(fmt, ap);

    va_end(ap); 
}

AL_EXPORT_API uint32_t alkes_set_error_level(uint32_t new_level)
{
    uint32_t old = s_error_level;

    s_error_level = new_level;

    return old;
}

AL_EXPORT_API uint32_t alkes_get_error_level()
{
    return s_error_level;
}

AL_EXPORT_API alkes_error_callback alkes_set_error_callback(alkes_error_callback new_callback)
{
    alkes_error_callback old = s_error_callback;

    s_error_callback = new_callback;

    return old;
}

AL_EXPORT_API alkes_error_callback alkes_get_error_callback()
{
    return s_error_callback;
}

int default_callback(const char* fmt, va_list arg)
{
#if (ALKES_API_WIN32 == 1)
    char dst[512];
    vsprintf_s(dst, sizeof(dst), fmt, arg);
    dst[sizeof(dst)/sizeof(dst[0])-1] = '\0';
    ::OutputDebugStringA(dst);
    return 0;
#else
    return vfprintf(stderr, fmt, arg);
#endif
}
